Roger,
Thanks for this message and for the link to your paper. I have a few remarks to offer, if I may.
JSON is not inherently "bad", nor is it inherently "good". Neither is XML, nor COBOL, nor SQL (my particular standardization specialty), nor ice cream.
Too many people seem to grab hold of the latest notion and believe that it might finally be the "silver bullet" that solves all of our problems, simply and elegantly.
Eventually, the hype wears off, intellectually honest people see the reality, which is that all of those things are merely tools.
JSON has an important place in the information technology ecosystem, which is acknowledged by the support that both XQuery and SQL have given it.